UV test steps 1. Plug in the power supply, turn the switch to - and the indicator light is on 2. Place the reference lens in the center of the UV test area of the lens, and then adjust the UV number makes the UV reading of the UV numerical display window and the number of the reference lens value is consistent 3. Remove the reference lens, and then put the lens to be tested. At this time, the display window, the displayed value is the test value Photochromic lens test steps 1. Plug in the power supply, switch to the second gear, the indicator light will not light up 2. Place the color-changing lens in the color-changing test area and press the color-changing switch The color-changing purple light is on, after 15 seconds, the lens completes the color change, and the light automatically turns off Specifications Name: Lens function tester Power: 20W Weight: 0.9KG Packing Weight: 1.35KG Packing list: 1 Tester 1 Manual Note:If you have any questions, please feel free to contact us, we will provide you with the best solution within 24 hours.Quality Assurance: As a seasoned seller, I understand the importance of quality assurance. The Photochromic Coated Lens Tester is meticulously crafted to meet strict industry standards, ensuring its long-lasting performance and customer satisfaction. With this tester, you can confidently offer top-notch products to your customers, enhancing your reputation as a trusted seller. Multi-function:Can test Anti-ultraviolet and anti-radiation lenses and discolored lenses. LED displays the specific value, the maximum can reach 400. It can perfectly replace the UV400 tester. LED lamp to test photochromic lens, with a timer to control the LED lamp, 15 secs later turn off automatically. Reliable Performance: With its strong logic and understanding capabilities, the Photochromic Coated Lens Tester delivers reliable results every time. Its precise measurements and accurate analysis provide essential information for both professionals and individuals seeking high-quality lenses. Rapid Color Change Detection: This innovative tester features advanced technology that enables quick color change detection in just 15 seconds. By simply placing the lens under the tester, you can easily determine the efficiency of photochromic coatings, ensuring optimal performance in different light conditions. Versatile Testing: The Photochromic Coated Lens Tester is a versatile tool that allows you to test the UV and radiation resistance of various lenses. From sunglasses to prescription glasses, this tester provides accurate results to ensure the lenses' durability and protection.